As our planet heats up and gas prices creep higher, prepare for some unusual consequences
Save gas, reduce pollution, and get fit, all at the same time
One reason is that the National Highway Traffic Safety Administration underestimates the price of gas
A PopSci contributor's experiment with a Honda Civic GX natural gas vehicle turns into a high-return investment on eBay
With gas prices going through the roof, yesterday's jalopy could be today's blue-chip used ride
Many systems are near their capacity
More people are buying hybrid cars, but the greener vehicles are still a relative rarity on the road
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